SU825255A1 - Automatic machine for bending articles such as split pins - Google Patents

Description

(54) AUTOMATIC MACHINE FOR FLEXIBLE PRODUCTS TYPE OF PINS

The invention relates to the processing of materials by pressure, in particular to press-forging equipment, and can be used in the hardware industry for the manufacture of cotter pins and other similar products. A known machine for the manufacture of pin-type products, comprising a wire feed and straightening mechanism mounted on a working plate, a cutting mechanism, a preliminary bending mechanism with a mandrel and a slider placed in guides, a final bending mechanism made in the form of two symmetrically arranged relative to the mechanism of the pre-flexible are movable in the axial direction of the sliders carrying the bending tool, the mechanism of removal of the finished product 1. The known automaton is characterized by insufficient productivity due to the need to retract the final sliders to a distance that allows free passage of the ends of the bent blank. The purpose of the invention is to increase productivity and improve product quality. This goal is achieved by the fact that in a well-known automatic machine for bending products such as cotter pins containing a wire feeding and straightening mechanism, a cutting mechanism, a pre-bending mechanism with a mandrel and a slider placed in guides mounted on the working plate, the final bending mechanism is made in the form of two located symmetrically with respect to the mechanism of preliminary bending movable in the axial direction of the sliders carrying the bending tool, and the mechanism of removal of the finished product, the slide of the mechanism of the preliminary The flexible bends are provided with a calibrating element rigidly attached to it and two pivotally attached spring-loaded pivoting levers with bending mandrels and copy lines, and the slide rails have rollers in contact with the copy liqueurs, while the mechanism sliders are finally bended at an angle to the surface of the working plate and on each of them a bending tool is rigidly fixed, and the pre-bending mechanism is equipped with a stroke control

a slide consisting of a connecting rod with an axis and an eccentric bushing placed on the axis of the connecting rod.

FIG. 1 shows an automatic machine for bending pin-type products; in FIG. 2, section A-A in FIG. one; in fig. 3 section bb in fig. one.

The machine for bending products of cotter pin type consists of a bed with a working plate 1, on which the workpiece cutting mechanism 2, the initial bending mechanism 3, the final bending mechanism 4 and 5, the wire feeding mechanism b, the straightening mechanism 8, the finished product removal mechanism 8 are installed. The initial bending mechanism 3 consists of a slider 9 with guides 10, on which two rotatable spring-loaded levers 11 are fixed by means of a shaft 12 and its support 13, equipped with bending mandrels 14 and copier lines 15, which interact with rollers 16 fixed on the guides 10. on the slider 9 is fixed element 17 for calibrating the pin pin. The slider 9 is driven from the crank shaft 18 and the connecting rod 19. The shaft 18 is driven from the gear 20 which is engaged with the central gear 21. The stroke of the slider 9 is adjusted by means of an eccentric bushing 22, which allows you to get the maximum size in the manufacture of cotter pins, the middle one and of the greatest lengths and minimal - in the manufacture of cotter pins, of small lengths. A pusher 23 with rollers 24 is provided for introducing into the bending zone and withdrawing bending mandrels 14 from it. Two sliders 4 and 5 of the final bending are located at an angle od to the plane of the working plate 1 of the bed. Such an arrangement of the sliders 4 and 5 is provided to provide a gap between the working plate 1 of the frame and the bending tool 25 in a certain area of movement of the sliders 4 and 5, which is necessary for the splint legs to pass during the initial bending. Slides 4 and 5 are driven by crank shafts 26 and connecting rods 27. Shafts 26 are driven from central gear 20 by gears 28-31. Centering mandrel 32 is stationary and always takes a certain working position. The machine works as follows.

The wire is fed by the feed mechanism 6 through the correct device 7 to the slides of the mechanism for cutting off the workpiece 2 and the initial bending 3 over the centering mandrel 32. The cutting mechanism 2 cuts off a certain length of the workpiece. Simultaneously with the cutting, the initial bending of the workpiece on the centering mandrel 32 by the bending mandrels 14, located at the time of the beginning of the bending above the cut workpiece at the greatest distance from each other, begins. As the slide 9 moves downward, due to the interaction of the copy lines 15 and the rollers 16, the bending mandrels 14 move closer together giving the blank a U-shape. During bending, the blank of the splint branch passes under the bending tool 25 fixed on the sliders 4 and 5, in the resulting gap between the bending tool 25 and the working plate of the bed 1. The sliders 4 and 5 complete the bending and straightening of the split pin. In order to cover the bending mandrels 14, which are at the time of the final bending of the cotter pin in the working area of the sliders 4 and 5, cutouts are provided in the bending tool 25. On the slider 9 of the initial bend, the element 17 is flexibly crimping and calibrating the pin of the pin in its upper part. At the end of the stroke of the slide 9, the bending sliders 4, 5 and 9 simultaneously cover the pin with its final bending. When returning the bending sliders to the initial position, the levers 11, together with the mandrels 14, are removed from the bending zone and brought into the original position (on the next cut piece) by means of the roller 24 and the plunger 23. When the bending sliders 4, 5 and 9 are returned The ready-to-pin pin is reset to its original position in the container by the removal mechanism 8. Then the cycle is repeated.

Claims (1)

1. USSR Author's Certificate 5 No. 447206, cl. B 21 F 45/24, 1972. T „G, 2 fft 2B g.Z.